So, what makes this unevolvable? Indeed, what makes this any different from any other sensory-related chemical reaction from the point of view of the organism? Evolution can and will exploit anything it can, even if we don’t understand it. This isn’t the first case of ‘quantum’ in the field of biology, and it wont be the last.

The only thing to change now is that the “chemical reaction” here is not sensory, but instead forms part of the process of photosynthesis in bacteria…